If anybody is curious what "a fixed charge" is, an example given by Merriam-Webster is Taxes as well as Interest. https://www.merriam-webster.com/dictionary/fi

If anybody is curious what "a fixed charge" is, an example given by Merriam-Webster is Taxes as well as Interest. https://www.merriam-webster.com/dictionary/fixed%20charge https://www.merriam-webster.com/dictionary/fixed%20charge